Process for preparing disiloxanes

Abstract

Disiloxanes of the general formula (CH 2 ═CHR 2 Si) 2 O, where R represents the same or different, monovalent hydrocarbon radicals, are obtained by reacting a compound of the formula (CH 2 ═CHRClSi) 2 O with a Grignard compound of the formula RMgX, where R is the same as above and X represents chlorine, bromine or iodine.

What is claimed is: 
     
       1. A process for preparing disiloxanes of the formula (CH 2  ═CHR 2  Si) 2  O, which comprises reacting a compound of the formula (CH 2  ═CHRClSi) 2  O with a Grignard compound of the formula RMgX, where R is a monovalent hydrocarbon radical and X is selected from the class consisting of chlorine, bromine and iodine and thereafter recovering the disiloxane from the reaction medium. 
     
     
       2. The process of claim 1, wherein the reaction is conducted in the presence of an inert solvent which is immiscible in water. 
     
     
       3. The process of claim 1, wherein an inert solvent which is immiscible in water is added after the reaction has been completed and prior to recovering the disiloxane from the reaction medium. 
     
     
       4. The process of claim 1, wherein X is chlorine.